There is a door at the end of a silent corridor. And it´s haunting Harry Potter´s dreams. Why else would he be waking in the middle of the night, screaming in terror?Here are just a few things on Harry´s mind:• A Defense Against the Dark Arts teacher with a personality like poisoned honey.• A venomous, disgruntled house-elf• Ron as keeper of the Gryffindor Quidditch team• The looming terror of the end-of-term Ordinary Wizarding Level exams. . . and of course, the growing